在学校学习可不可以写成 study at school还是study in the school

在学校学习可不可以写成 study at school还是study in the school 是study at xx school还是study in xx school They will study in the school or study at I study in a primary school.还是I study at a primary school.是不 study at a mixed school还是study in a mixed school 是study in a middle school还是study at a middle school? 在学校 应该是in the school 还是In school study at a primary school study at No.2 middle school和study in No.2 middle school哪个介词用 I study at school .对否?I study in school 与有何区别? All the students in our school study hard At the students in children should study in school.